US20040170541A1 - Sheathed mid-section of a catalyst housing - Google Patents
Sheathed mid-section of a catalyst housing Download PDFInfo
- Publication number
- US20040170541A1 US20040170541A1 US10/481,911 US48191104A US2004170541A1 US 20040170541 A1 US20040170541 A1 US 20040170541A1 US 48191104 A US48191104 A US 48191104A US 2004170541 A1 US2004170541 A1 US 2004170541A1
- Authority
- US
- United States
- Prior art keywords
- sheet metal
- jacket
- marginal
- metal plate
- marginal regions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/02—Fitting monolithic blocks into the housing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Definitions
- the invention relates to a jacket-shaped middle part of a catalytic converter housing, in particular for exhaust systems for internal combustion motors, which jacket-shaped middle part, incorporating an intermediate layer made of an equalising material, encloses a monolith which comprises a catalytically effective material under initial radial tension, wherein the marginal regions of the sheet metal plate, which has been formed to constitute the jacket-shaped middle part, mutually overlap and are firmly interconnected.
- Such middle parts of catalytic converter housings for exhaust systems of internal combustion engines, in particular in motor vehicles, are known (EP 0 818 615 A2).
- the housing is made so that the sheet metal plate is wrapped around the ceramic monolith which is enveloped by an expanded material as an equalising material, wherein their marginal regions are made to overlap.
- the sheet metal plate which in this way has been formed to constitute the jacket-shaped middle part, radially, is firmly pressed onto the ceramic monolith or metal monolith by means of retainer straps so that in the state with initial radial tension the mutually overlapping marginal regions can be welded together.
- funnel-shaped end parts are welded to both ends of the jacket-shaped middle part.
- this object is met by a middle part of a catalytic converter housing of the type mentioned in the introduction, in that the sheet metal thickness in the marginal areas of the jacket-shaped middle part in the area of overlap is reduced to such an extent in relation to the remaining metal plate, and in that the marginal regions of the jacket-shaped middle part are mutually and vertically offset in relation to the outside of the sheet metal plate, that the outsides or insides of the marginal regions and of the adjoining regions without reduction in sheet metal thickness are in the same respective jacket plane.
- the sum of the reduced sheet metal thicknesses of the two marginal regions is equal to the full sheet metal thickness.
- the sheet metal thickness of each of the two marginal regions is reduced to half the full sheet metal thickness of the sheet metal plate.
- the reduction in the sheet metal thickness in the marginal regions and the offset arrangement of the marginal regions can be realised in various ways.
- the two marginal regions are offset to opposite sides.
- the marginal regions can also be designed in a kind of tongue-and-groove fit. From the point of view of production technology, the first alternative is certainly the simpler one. It can be realised by welding-on thinner marginal strips in the manner of tailored-blanks production, or by rolling the marginal regions or by mechanical removal.
- the invention further relates to a flat sheet metal plate with marginal strips which are held on opposite margins, which marginal strips are offset vertically to the outside or inside of the plate and in opposite direction and whose sheet metal thickness is reduced such that their total thickness is equal to that of the sheet metal plate and that their outsides are aligned in the plane of the outsides of the sheet metal plate, for use as the jacket-shaped middle part of a catalytic converter housing of the design described above.
- FIG. 1 a cross section of a middle part of a catalytic converter housing with enclosed ceramic monolith prior to being strapped into place with retainer straps wound around it;
- FIG. 2 an enlarged view of a section according to X in FIG. 1.
- a jacket-shaped middle part 1 with an overlap region 2 is formed as an equalising material around a cylindrical monolith 3 which is made from catalytically effective material, as a rule a ceramic material, with an intermediate layer 4 made from equalising material.
- the equalising material holds the monolith fixed during different heat expansion of the monolith 3 and the jacket part 1 .
- the middle part 1 comprises two marginal regions 5 , 6 which extend axially, whose sheet metal thickness is half the usual sheet metal thickness of the plate. They are held on the middle part of the jacket-shaped middle part 1 , which is not reduced in thickness, so as to be offset in height in relation to each other. Preferably, they are welded on by laser.
- the outside 1 a of the marginal area 5 is situated in the outer jacket plane 1 a of the middle part 1
- the inside of the marginal region 6 is situated in the inner jacket plane 1 b of the middle part 1 .
- a further characteristic feature consists of there being play 7 , 8 between the edges of the mutually overlapping marginal regions 5 , 6 and the stepped transitions 9 , 10 which are formed by the marginal regions 5 , 6 and the adjacent regions which are the thickness of the sheet metal.
- This play 7 , 8 has been provided so that when tension is applied by means of the retainer straps which wind round the middle part 1 it is possible to shift the marginal regions 5 , 6 in relation to each other, without there being any upsetting. After such tensioning, as a result of which in an ideal case the play 7 , 8 is reduced to zero, the marginal areas 5 , 6 can be welded together.
Abstract
Description
- The invention relates to a jacket-shaped middle part of a catalytic converter housing, in particular for exhaust systems for internal combustion motors, which jacket-shaped middle part, incorporating an intermediate layer made of an equalising material, encloses a monolith which comprises a catalytically effective material under initial radial tension, wherein the marginal regions of the sheet metal plate, which has been formed to constitute the jacket-shaped middle part, mutually overlap and are firmly interconnected.
- Such middle parts of catalytic converter housings for exhaust systems of internal combustion engines, in particular in motor vehicles, are known (EP 0 818 615 A2). The housing is made so that the sheet metal plate is wrapped around the ceramic monolith which is enveloped by an expanded material as an equalising material, wherein their marginal regions are made to overlap. After this, the sheet metal plate, which in this way has been formed to constitute the jacket-shaped middle part, radially, is firmly pressed onto the ceramic monolith or metal monolith by means of retainer straps so that in the state with initial radial tension the mutually overlapping marginal regions can be welded together. Subsequently, for completing the catalytic converter housing, funnel-shaped end parts are welded to both ends of the jacket-shaped middle part.
- It has been shown that during the production process the ceramic monolith is subjected to very considerable loads in the area of the mutually overlapping marginal regions, which loads can lead to damage to, or destruction of, the monolith.
- It is the object of the invention to create a jacket-shaped middle part of a catalytic converter housing of the type mentioned in the introduction, in which the monolith in the area of the overlapping marginal regions of the sheet metal plate is not subjected to dangerously high pressure loads.
- According to the invention, this object is met by a middle part of a catalytic converter housing of the type mentioned in the introduction, in that the sheet metal thickness in the marginal areas of the jacket-shaped middle part in the area of overlap is reduced to such an extent in relation to the remaining metal plate, and in that the marginal regions of the jacket-shaped middle part are mutually and vertically offset in relation to the outside of the sheet metal plate, that the outsides or insides of the marginal regions and of the adjoining regions without reduction in sheet metal thickness are in the same respective jacket plane.
- According to the invention, due to the special design of the mutually overlapping marginal regions, despite the radial pressure loads there is no local peak load of the pressure-sensitive monolith, either during production or during operation. Instead, the monolith is subjected to an even load over its entire circumference. Consequently, fewer failures occur, both during production and in operation.
- According to the invention, the sum of the reduced sheet metal thicknesses of the two marginal regions is equal to the full sheet metal thickness. Preferably, the sheet metal thickness of each of the two marginal regions is reduced to half the full sheet metal thickness of the sheet metal plate.
- The reduction in the sheet metal thickness in the marginal regions and the offset arrangement of the marginal regions can be realised in various ways. According to a first embodiment, the two marginal regions are offset to opposite sides. However, the marginal regions can also be designed in a kind of tongue-and-groove fit. From the point of view of production technology, the first alternative is certainly the simpler one. It can be realised by welding-on thinner marginal strips in the manner of tailored-blanks production, or by rolling the marginal regions or by mechanical removal.
- In order, during production, in particular during forming and tensioning of the jacket-shaped middle part around the monolith, which due to production tolerances can have various circumferential dimensions, to avoid uniform circumferential tension without local pressure peaks due to overlapping with a step in the thickness, according to a further embodiment of the invention, on the middle part which encloses the monolith there is to be play between the edges of the marginal regions and the opposite stepped transitions between the marginal regions and the regions where the sheet metal thickness has not been reduced. This makes it possible to shift the marginal regions one on top of the other, while the thickness relationships in the overlapping region of the marginal regions remains unchanged, so that the play in an ideal case is reduced right down to zero, with the outsides and insides of the middle part then also establishing a gap-free and step-free transition in the overlapping area.
- The invention further relates to a flat sheet metal plate with marginal strips which are held on opposite margins, which marginal strips are offset vertically to the outside or inside of the plate and in opposite direction and whose sheet metal thickness is reduced such that their total thickness is equal to that of the sheet metal plate and that their outsides are aligned in the plane of the outsides of the sheet metal plate, for use as the jacket-shaped middle part of a catalytic converter housing of the design described above.
- Below, the invention is explained by means of a drawing which shows one embodiment. Specifically, the following are shown:
- FIG. 1 a cross section of a middle part of a catalytic converter housing with enclosed ceramic monolith prior to being strapped into place with retainer straps wound around it; and
- FIG. 2 an enlarged view of a section according to X in FIG. 1.
- From a flat sheet metal plate, a jacket-shaped middle part1 with an
overlap region 2 is formed as an equalising material around acylindrical monolith 3 which is made from catalytically effective material, as a rule a ceramic material, with an intermediate layer 4 made from equalising material. The equalising material holds the monolith fixed during different heat expansion of themonolith 3 and the jacket part 1. The middle part 1 comprises twomarginal regions - As shown above all in FIG. 2, the
outside 1 a of themarginal area 5 is situated in theouter jacket plane 1 a of the middle part 1, while the inside of themarginal region 6 is situated in theinner jacket plane 1 b of the middle part 1. - Apart from the characteristic feature, according to the invention, of a constant sheet metal thickness over the circumference of the jacket-shaped middle part1 also in the area of
overlap 2, a further characteristic feature consists of there being play 7, 8 between the edges of the mutually overlappingmarginal regions stepped transitions 9, 10 which are formed by themarginal regions play 7, 8 has been provided so that when tension is applied by means of the retainer straps which wind round the middle part 1 it is possible to shift themarginal regions play 7, 8 is reduced to zero, themarginal areas
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10131466A DE10131466B4 (en) | 2001-06-29 | 2001-06-29 | Sheath-shaped central part of a catalyst housing |
DE10131466.3 | 2001-06-29 | ||
PCT/EP2002/007089 WO2003008773A1 (en) | 2001-06-29 | 2002-06-27 | Sheathed mid-section of a catalyst housing |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040170541A1 true US20040170541A1 (en) | 2004-09-02 |
Family
ID=7689957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/481,911 Abandoned US20040170541A1 (en) | 2001-06-29 | 2002-06-27 | Sheathed mid-section of a catalyst housing |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040170541A1 (en) |
EP (1) | EP1399655B1 (en) |
CN (1) | CN1522337A (en) |
CZ (1) | CZ20033546A3 (en) |
DE (2) | DE10131466B4 (en) |
WO (1) | WO2003008773A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060010861A1 (en) * | 2002-05-07 | 2006-01-19 | Jacques Heydens | Cleanable device for depollution of engine exhaust gases |
US10619540B2 (en) | 2018-03-22 | 2020-04-14 | Faurecia Emissions Control Technologies, Germany Gmbh | Exhaust system component |
US11149613B2 (en) | 2016-07-13 | 2021-10-19 | Corning Incorporated | Exhaust gas treatment article and methods of manufacturing same |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005010267A1 (en) * | 2005-03-07 | 2006-09-14 | Arvinmeritor Emissions Technologies Gmbh | Method for producing an exhaust gas-conducting device, in particular a vehicle exhaust gas purification device |
DE102007023704A1 (en) * | 2007-05-22 | 2008-11-27 | Arvinmeritor Emissions Technologies Gmbh | Exhaust treatment device and method of manufacturing an exhaust treatment device |
PL2037092T3 (en) * | 2007-09-11 | 2011-12-30 | Bosal Emission Control Systems Nv | Components for an exhaust gas system |
DE102011016170A1 (en) * | 2011-04-05 | 2012-10-11 | Faurecia Emissions Control Technologies, Germany Gmbh | Exhaust gas device and method for its production |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4448754A (en) * | 1982-08-31 | 1984-05-15 | Toyota Jidosha Kabushiki Kaisha | Monolithic catalyst catalytic converter with catalyst holding expansible retainer ring |
US4448764A (en) * | 1982-07-06 | 1984-05-15 | Pierce Chemical Company | Direct-acting iodinating reagent |
US6000131A (en) * | 1996-10-15 | 1999-12-14 | Corning Incorporated. | Method of making a catalytic converter for use in an internal combustion engine |
US6185819B1 (en) * | 1996-07-10 | 2001-02-13 | Volkswagen Ag | Catalytic converter housing arrangement |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB758124A (en) * | 1954-03-15 | 1956-09-26 | Calumet & Hecla | Improvements in or relating to the production of metal tubing from strip material |
JPS5656721A (en) * | 1979-10-11 | 1981-05-18 | Sumitomo Electric Ind Ltd | Manufacture of cylindrical sponge metal |
DE19819202A1 (en) * | 1998-04-29 | 1999-11-04 | Emitec Emissionstechnologie | Conical honeycomb body and process for its manufacture |
DE19838750A1 (en) * | 1998-08-26 | 2000-03-02 | Volkswagen Ag | Process for the production of a catalyst housing by means of winding / tensioning technology |
DE19846900C2 (en) * | 1998-10-12 | 2000-08-10 | Thyssenkrupp Stahl Ag | Method and device for producing a metal strip for tailored blanks |
-
2001
- 2001-06-29 DE DE10131466A patent/DE10131466B4/en not_active Expired - Fee Related
-
2002
- 2002-06-27 CN CNA028131266A patent/CN1522337A/en active Pending
- 2002-06-27 WO PCT/EP2002/007089 patent/WO2003008773A1/en active IP Right Grant
- 2002-06-27 EP EP02754765A patent/EP1399655B1/en not_active Expired - Fee Related
- 2002-06-27 DE DE50211113T patent/DE50211113D1/en not_active Expired - Lifetime
- 2002-06-27 CZ CZ20033546A patent/CZ20033546A3/en unknown
- 2002-06-27 US US10/481,911 patent/US20040170541A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4448764A (en) * | 1982-07-06 | 1984-05-15 | Pierce Chemical Company | Direct-acting iodinating reagent |
US4448754A (en) * | 1982-08-31 | 1984-05-15 | Toyota Jidosha Kabushiki Kaisha | Monolithic catalyst catalytic converter with catalyst holding expansible retainer ring |
US6185819B1 (en) * | 1996-07-10 | 2001-02-13 | Volkswagen Ag | Catalytic converter housing arrangement |
US6000131A (en) * | 1996-10-15 | 1999-12-14 | Corning Incorporated. | Method of making a catalytic converter for use in an internal combustion engine |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060010861A1 (en) * | 2002-05-07 | 2006-01-19 | Jacques Heydens | Cleanable device for depollution of engine exhaust gases |
US7470301B2 (en) * | 2002-05-07 | 2008-12-30 | Faurecia Systems D'echappement | Cleanable device for depollution of engine exhaust gases |
US11149613B2 (en) | 2016-07-13 | 2021-10-19 | Corning Incorporated | Exhaust gas treatment article and methods of manufacturing same |
US10619540B2 (en) | 2018-03-22 | 2020-04-14 | Faurecia Emissions Control Technologies, Germany Gmbh | Exhaust system component |
Also Published As
Publication number | Publication date |
---|---|
EP1399655A1 (en) | 2004-03-24 |
DE10131466A1 (en) | 2003-07-24 |
DE10131466B4 (en) | 2006-09-21 |
CN1522337A (en) | 2004-08-18 |
EP1399655B1 (en) | 2007-10-24 |
CZ20033546A3 (en) | 2004-06-16 |
DE50211113D1 (en) | 2007-12-06 |
WO2003008773A1 (en) | 2003-01-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: THYSSENKRUPP STAHL AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FLEHMIG, THOMAS;FEDERWISCH, JUERGEN;EMDE, FRED;AND OTHERS;REEL/FRAME:015275/0606;SIGNING DATES FROM 20040204 TO 20040325 Owner name: VOLKSWAGEN AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FLEHMIG, THOMAS;FEDERWISCH, JUERGEN;EMDE, FRED;AND OTHERS;REEL/FRAME:015275/0606;SIGNING DATES FROM 20040204 TO 20040325 |
|
AS | Assignment |
Owner name: VOLKSWAGEN AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THYSSENKRUPP STAHL AG;REEL/FRAME:020372/0815 Effective date: 20071210 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |